LOTUS WATER GARDEN PRODUCTS CLEAR POND 50 WATT GRAVITY GUV POND FILTER (2 X 25 WATT)(48000) OR ANY POND FILTER UV WHICH REQUIRES A 25 WATT ELECTRONIC BALLAST.THE LOTUS CLEAR POND 50 IS MADE UP OF A SINGLE 2x 25 WATT ELECTRONIC BALLAST AND THIS LISTING IS ONLY FOR ONE BALLAST IF YOU HAVE REPLACED THE UV BULB AND IT IS STILL NOT WORKING,THE BALLAST WILL MOST LIKELY BE AT FAULT.CHEAPER ALTERNATIVE TO REPLACING THE WHOLE ELECTRICAL LID.EASY SELF DIY REPAIR.BALLAST ONLY,GEAR TRAY NOT INCLUDED Manufacturer of ballast may vary and differ from one shown in the photos
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